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industries, and were found to bea major dioxin source. In 1995, amendments to <br />the Clean Air Act (CAA) were enacted to control the emissions of dioxins, as well as <br />other toxins, such . as mercury, hydrogen chloride and particulate matter. <br />With the implementation of the CAA requirements in the following years, dioxin <br />emissions from VVTEdecreased significantly, as shown in Figure 5_1. 14 The U.S. EPA <br />has stated that "VVaste-to-Energy is no longer e major contributor of dioxin <br />emissions." <br />Figure 5-1~ Dioxin Emissions from Wl[E Facilities, 1990 — 2005 <br />4,500 4,173 3,998 <br />4,000 <br />� <br />' <br />o soo <br />.m <br />x.noo <br />�� <br />2,500 <br />FA <br />2,000 <br />AA 1,500 <br />UJ <br />� <br />1.nuo <br />son <br />40.6 12.0 <br />o 1990 1993 1996 1999 oouo u»os <br />Year <br />Mercury is another toxin that was found in VVTE exhaust and that was addressed in <br />the C/V\ amendments. BY modifications in the burning process and the use of <br />activated carbon injection in the air pollution control system, dioxins and mercury, as <br />well as hydrocarbons and otharconstituents, have effectively been removed from the <br />gas stream. Mercury emissions from VVTE have been reduced from 1990 levels, as <br />shown in Figure 5-2- 1s <br />Figure 5-2. Mercury Emission from Wl[E Facilities, 1990- 2005 <br />� <br />tz <br />40.0 <br />.52 30.0 <br />LU <br />20.0 <br />1(lO <br />MIA <br />IN <br />Year <br />4.05 <br />^"Emisyionsfnom/LangaMVVCUnitsatMA[TConnp|iance,DucketA-9O-45(LargeMVVCs),U.5. <br />EPA, Research Triangle Park, NC. <br />15 Ibid. <br />GBB/C08027-01 28 August 15, 2008 <br />